didUpdateWidget method Null safety key, the framework will update the widget property of this State object to refer to the new widget and then call this method with the previous widget as an argument . Override this method to respond when the widget changes (e.g., to start implicit animations).
Read moreHow do I force a widget to rebuild in Flutter?
The solution is to pass a new Key to WidgetB every time we need it to be rebuilt : WidgetA will see that WidgetB has changed and will rebuild it when setState is called. In other words, whenever a stateful widget’s Key property changes, calling setState on its parent will force a rebuild of the stateful widget.
Read moreHow build () method works how it rebuild itself in Flutter?
There are six sets, because whenever you run the Flutter app, the setState() calls the build() method and it displays the number 0 on the screen. Next, each time you press the button, it rebuilds the descendant widget trees also. If we quit the app and restarts the app again, it starts with a fresh display of a screen.22 May 2021
Read moreHow do you rebuild the parent widget in Flutter?
How can I force the parent to rebuild? Since your parent is a Stateless Widget, you cannot change it’s color. You must use a StatefulWidget instead. Otherwise, you can use a Callback function from the child to the parent .
Read moreWhy is the build () method on state and not stateful widgets?
Why is the build method on State, and not StatefulWidget? Putting a Widget build(BuildContext context) method on State rather than putting a Widget build(BuildContext context, State state) method on StatefulWidget gives developers more flexibility when subclassing StatefulWidget .
Read moreWhat is create state in Flutter?
createState method Null safety Creates the mutable state for this widget at a given location in the tree . Subclasses should override this method to return a newly created instance of their associated State subclass: @override State<MyWidget> createState() => _MyWidgetState();
Read moreWhat is stateful and stateless in Flutter?
Stateful and stateless widgets If a widget can change—when a user interacts with it, for example—it’s stateful . A stateless widget never changes. Icon , IconButton , and Text are examples of stateless widgets.
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